JP5097769B2 - Method for manufacturing ring-shaped member - Google Patents

Method for manufacturing ring-shaped member Download PDF

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JP5097769B2
JP5097769B2 JP2009503753A JP2009503753A JP5097769B2 JP 5097769 B2 JP5097769 B2 JP 5097769B2 JP 2009503753 A JP2009503753 A JP 2009503753A JP 2009503753 A JP2009503753 A JP 2009503753A JP 5097769 B2 JP5097769 B2 JP 5097769B2
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ring
shaped member
pipe material
die
forming
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JPWO2008111121A1 (en
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俊明 金光
勝彦 中山
直樹 藤井
一幸 小田
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Kanemitsu Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops

Description

本発明は、金属製のパイプ材からリング状部材を得るリング状部材の製造方法に関する。   The present invention relates to a method for manufacturing a ring-shaped member that obtains a ring-shaped member from a metal pipe material.

従来、例えば、図２に示すようなリング状部材１０は、図３（ａ），（ｂ）に示す所定の板厚を有する素材２０から、プレス装置によって複数個のリング状部材１０を単列または複数列で打ち抜く方法によって製造されていた。   Conventionally, for example, a ring-shaped member 10 as shown in FIG. 2 is a single row of a plurality of ring-shaped members 10 from a material 20 having a predetermined plate thickness shown in FIGS. Or it was manufactured by the method of punching in multiple rows.

ところが、上記従来の製造方法では、素材２０の重量に対するリング状部材１０の重量の割合である歩留り率が悪く、リング状部材１０のコストを高くしていた。その理由は、リング状部材１０に対するスケルトンＳ１およびスラッグＳ２の割合が高い材料取りとなるためである。なお、上記「スケルトン」とは、複数個のリング状部材１０の打ち抜きによって残る枠状のスクラップのことであり、また、上記「スラッグ」とは、複数個のリング状部材１０の打ち抜き時に、ポンチで打ち抜き除去される複数のスクラップのことである。   However, in the conventional manufacturing method described above, the yield rate, which is the ratio of the weight of the ring-shaped member 10 to the weight of the material 20, is poor, and the cost of the ring-shaped member 10 is increased. The reason is that the material ratio is high in the ratio of the skeleton S1 and the slug S2 to the ring-shaped member 10. The “skeleton” is frame-like scrap left by punching a plurality of ring-shaped members 10, and the “slag” is a punch when punching a plurality of ring-shaped members 10. It is a plurality of scraps that are punched and removed at the same time.

そこで、図４に示すようなリング状部材の製造方法が提案されている（例えば、特許文献１参照。）。このリング状部材の製造方法は、長方形状の鋼板２１の中央に長手方向にスリット２２を形成する工程と、前記スリット２２を押し広げて多角形部材２３を得る工程と、前記多角形部材２３の角部２３ａ及び辺部２３ｂを周方向になめらかな円弧状に成形してリング状部材１０を得る工程とからなる。   Therefore, a method for manufacturing a ring-shaped member as shown in FIG. 4 has been proposed (for example, see Patent Document 1). The manufacturing method of this ring-shaped member includes a step of forming a slit 22 in the longitudinal direction in the center of a rectangular steel plate 21, a step of expanding the slit 22 to obtain a polygonal member 23, And forming the ring-shaped member 10 by forming the corner portion 23a and the side portion 23b into a circular arc that is smooth in the circumferential direction.

このようなリング状部材の製造方法によれば、長方形状の鋼板２１のスリット２２を押し広げて成形するので、図３のようなスケルトンＳ１やスラッグＳ２が発生することはなく、素材ロスを減少でき、リング状部材１０の加工コストを低減することができるというものである。   According to such a ring-shaped member manufacturing method, since the slit 22 of the rectangular steel plate 21 is formed by being expanded, the skeleton S1 and the slug S2 as shown in FIG. 3 are not generated, and the material loss is reduced. The processing cost of the ring-shaped member 10 can be reduced.

特開２００４−１８８５４８号公報JP 2004-188548 A

しかしながら、上記特許文献１に記載のリング状部材の製造方法では、素材たる鋼板材からリング状部材を得るには、まず、鋼板材を長方形状に切断して長方形状の鋼板２１を得る工程が必要であり、しかる後、この長方形状の鋼板２１の中央にスリット２２をガス、プラズマ又はレーザにより形成する工程、更に、雌雄型及び成形型からなる装置でスリット２２を押し広げて多角形部材２３を得る工程、更に又、多角形部材２３の角部２３ａ及び辺部２３ｂを成形型により周方向になめらかな円弧状に成形する工程等、数多くの工程を要し、また各工程の複雑化を招くのであった。   However, in the method of manufacturing a ring-shaped member described in Patent Document 1, in order to obtain a ring-shaped member from a steel plate material, a process of first obtaining a rectangular steel plate 21 by cutting the steel plate material into a rectangular shape. After that, the step of forming the slit 22 in the center of the rectangular steel plate 21 by gas, plasma or laser, and further, the slit 22 is expanded by a device comprising a male and female mold and a molding die to form a polygonal member 23. In addition, many steps such as a step of forming the corners 23a and the side portions 23b of the polygonal member 23 into a circular arc that is smooth in the circumferential direction by a molding die are required, and each step is complicated. I was invited.

本発明は、このような問題を解決するためになされたものであって、その目的とするところは、素材ロスを無くし、加工コストの低減を図れるうえ、パイプ材から少ない工程数で簡単に連続的にリング状部材を得ることができるリング状部材の製造方法を提供することにある。   The present invention has been made in order to solve such problems. The object of the present invention is to eliminate material loss, to reduce processing costs, and to continuously continuously from a pipe material with a small number of processes. It is providing the manufacturing method of the ring-shaped member which can obtain a ring-shaped member in general.

本発明は、請求項１に記載のように、金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部全周を内向きに曲げて先細状の截頭円錐筒部を成形する工程と、前記截頭円錐筒部を更に内向きに折り曲げ加工して内向きに張り出すフランジ部を成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含んでおり、
前記截頭円錐筒部を成形する工程においては、外拡がり状の断面皿形のダイス穴を有する第１のダイスと、前記パイプ材の内径よりも小さい外径を有する第１のセンターピンとを用意し、前記ダイス穴内に前記第１のセンターピンの先端部を突出させ、前記パイプ材の端部を前記ダイス穴のテーパー内周と前記センターピンの突出先端部の外周との間に進入させることにより、前記パイプ材の端部全周を内向きに曲げて先細状の截頭円錐筒部を成形することを特徴とする、リング状部材の製造方法。
ことに特徴を有するものである。
このような構成によれば、パイプ材の端部にフランジ部を内向きに張り出し成形し、該フランジ部をパイプ材から切り離してリング状部材を得るので、図３のようなスケルトンＳ１やスラッグＳ２が発生することはなく、素材ロスを無くし、リング状部材の加工コストを低減でき、またパイプ材からリング状部材を簡単に連続的に得ることができる。しかも、パイプ材の端部にフランジ部を内向きに成形するに先立って、截頭円錐筒部を成形するので、パイプ材の板厚が厚い場合も、パイプ材の端部に直角なフランジ部をにわかに成形するに比較して、局部的に肉が薄くなるのを避けながらフランジ部をできる限り均一な肉厚に成形することができる。 According to a first aspect of the present invention, there is provided a ring-shaped member manufacturing method for obtaining a ring-shaped member from a metal pipe material. A step of forming a head-cone tube portion, a step of further bending the truncated conical tube portion inward to form a flange portion projecting inward, and separating the flange portion from the pipe material to form a ring-shaped member and Nde including the step of obtaining a,
In the step of forming the truncated conical cylinder portion, a first die having a die hole having an outwardly expanding cross-sectional dish shape and a first center pin having an outer diameter smaller than the inner diameter of the pipe material are prepared. The tip of the first center pin protrudes into the die hole, and the end of the pipe material enters between the taper inner periphery of the die hole and the outer periphery of the projecting tip of the center pin. The ring-shaped member manufacturing method is characterized by forming a tapered truncated conical cylinder portion by bending the entire circumference of the end portion of the pipe material inward .
It has a special feature.
According to such a configuration, a flange portion is formed in an inward direction at the end portion of the pipe material, and the flange portion is separated from the pipe material to obtain a ring-shaped member . Therefore, the skeleton S1 and the slug S2 as shown in FIG. The material loss is eliminated, the processing cost of the ring-shaped member can be reduced, and the ring-shaped member can be easily and continuously obtained from the pipe material. Moreover, since the truncated conical cylinder portion is formed before the flange portion is formed inward at the end portion of the pipe material, the flange portion perpendicular to the end portion of the pipe material is formed even when the pipe material is thick. As compared with the case where the mold is formed smoothly, the flange portion can be formed with a uniform thickness as much as possible while avoiding the thinning of the thickness locally.

本発明によれば、パイプ材から素材ロスを無くし、しかも少ない工程数で簡単にリング状部材を連続的に得ることができ、リング状部材の加工コストを低減できる利点がある。   According to the present invention, there is an advantage that a material loss can be eliminated from the pipe material, and the ring-shaped member can be easily obtained continuously with a small number of steps, and the processing cost of the ring-shaped member can be reduced.

本発明の一実施例を示すリング状部材の製造方法の工程断面図である。It is process sectional drawing of the manufacturing method of the ring-shaped member which shows one Example of this invention. リング状部材の一例を示す平面図である。It is a top view which shows an example of a ring-shaped member. 従来の素材からブランクを打ち抜く工程を示す平面図であり、（ａ）は単列打ち抜きを示し、（ｂ）は並列打ち抜きを示している。It is a top view which shows the process of punching a blank from the conventional raw material, (a) shows single row punching, (b) has shown parallel punching. 特許文献１に記載のリング状部材の製造方法の工程図である。6 is a process diagram of a method for manufacturing a ring-shaped member described in Patent Document 1. FIG.

１ パイプ材
１ａ 端部
１ｂ 截頭円錐筒部
１ｃ フランジ部
１０ リング状部材 DESCRIPTION OF SYMBOLS 1 Pipe material 1a End part 1b A truncated cone part 1c Flange part 10 Ring-shaped member

以下、本発明に係るリング状部材の製造方法の好適な実施形態を図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a method for producing a ring-shaped member according to the invention will be described with reference to the drawings.

図１は本発明の一実施例を示すリング状部材の製造方法の工程断面図である。
まず、図１（ａ）のように、軟鋼、銅、アルミニウム、鉄、ステンレス等金属製の断面円形のパイプ材１をプレス加工装置２にセットする。プレス加工装置２は、パイプ材１に挿通されるパンチ３と、パンチアウタ４と、第１のダイス５および第１のセンターピン６を備えている。第１のダイス５はパンチ３の先端に対向して外拡がり状の断面皿形のダイス穴７を有し、このダイス穴７内にパイプ材１の内径よりも小さい外径を有する第１のセンターピン６の先端部６ａが突出している。
パイプ材１はこれの端部１ａがパンチ３の先端部から所定量だけ突出するようにセットされる。 FIG. 1 is a process sectional view of a method for manufacturing a ring-shaped member according to an embodiment of the present invention.
First, as shown in FIG. 1A, a pipe material 1 having a circular cross section made of a metal such as mild steel, copper, aluminum, iron, and stainless steel is set in a press working device 2. The press working device 2 includes a punch 3 inserted through the pipe material 1, a punch outer 4, a first die 5, and a first center pin 6. The first die 5 has a die hole 7 having an outwardly extending cross-sectional shape facing the tip of the punch 3. The first die 5 has an outer diameter smaller than the inner diameter of the pipe material 1 in the die hole 7. The front end 6a of the center pin 6 protrudes.
The pipe member 1 is set so that the end portion 1a of the pipe member 1 protrudes from the tip portion of the punch 3 by a predetermined amount.

次いで、同図（ｂ）のように、パンチ３と第１のダイス５とを相対的に接近移動させ、パイプ材１の端部１ａを断面皿形のダイス穴７のテーパー内周とセンターピン６の突出先端部６ａの外周との間に進入させることにより、パイプ材１の端部１ａ全周を内向きに曲げて先細状の截頭円錐筒部１ｂを成形する（截頭円錐筒部成形工程）。   Next, as shown in FIG. 2B, the punch 3 and the first die 5 are moved relatively close to each other, and the end portion 1a of the pipe material 1 is connected to the taper inner periphery and the center pin of the die hole 7 having a dish-shaped cross section. 6, the entire end 1a of the pipe member 1 is bent inward to form a tapered truncated conical tube portion 1b (the truncated conical tube portion). Molding process).

次いで、同図（ｃ）のように、第２のダイス８と、このダイス８のダイス穴８ａに挿通したパイプ材１の内径（パンチ３の外径）と略同一径の第１のハジキ９と、このハジキ９の中心穴９ａに挿通したリング状部材１０（図２参照）の内径と同一径の第２のセンターピン１１を備え、第２のセンターピン１１の先端部１１ａは第１のハジキ９の先端から突出させている加工位置において、第２のダイス８、第１のハジキ９、および第２のセンターピン１１とパンチ３とを相対的に接近移動させ、第１のハジキ９の先端を截頭円錐筒部１ｂに押圧させることにより該截頭円錐筒部１ｂをパイプ材１の軸心に対し略直角になるまで折り曲げ加工して内向きに張り出すフランジ部１ｃを成形する（フランジ部成形工程）。   Next, as shown in FIG. 3C, the second dice 8 and the first repelling 9 having substantially the same diameter as the inner diameter of the pipe material 1 inserted through the die hole 8a of the die 8 (outer diameter of the punch 3). And a second center pin 11 having the same diameter as the inner diameter of the ring-shaped member 10 (see FIG. 2) inserted through the center hole 9a of the repelling 9, and the tip 11a of the second center pin 11 is The second die 8, the first repellent 9, and the second center pin 11 and the punch 3 are moved relatively close to each other at the processing position protruding from the tip of the repellent 9. By pressing the front end of the truncated conical cylinder portion 1b against the truncated conical cylinder portion 1b until it is substantially perpendicular to the axis of the pipe member 1, a flange portion 1c is formed that projects inward ( Flange part molding process).

最後に、同図（ｄ）のように、第３のダイス１２と、このダイス穴１２ａに挿通したパイプ材１の内径（パンチ３の外径）と略同一径の第２のハジキ１３を備えた加工位置において、第３のダイス１２および第２のハジキ１３とパンチ３とを相対的に接近移動させると、フランジ部１ｃが第２のハジキ１３でパンチ３の先端に押し付けられ、更に第３のダイス１２をパンチ３に相対接近移動させることにより、ダイス１２とパンチ３間でせん断力が働き、パンチ３とダイス１２の刃先がフランジ部１ｃの付け根部分に食い込み、せん断することによりフランジ部１ｃがパイプ材１から切り離されてリング状部材１０（図２参照）を得ることができる（フランジ部切り離し工程）。   Finally, as shown in FIG. 4D, a third die 12 and a second repelling 13 having substantially the same diameter as the inner diameter of the pipe member 1 inserted through the die hole 12a (the outer diameter of the punch 3) are provided. When the third die 12 and the second repelling 13 and the punch 3 are moved relatively close to each other at the machining position, the flange portion 1c is pressed against the tip of the punch 3 by the second repelling 13, and further the third When the die 12 is moved relatively close to the punch 3, a shearing force acts between the die 12 and the punch 3, and the cutting edge of the punch 3 and the die 12 bites into the root portion of the flange portion 1 c, and the flange portion 1 c is sheared. Can be separated from the pipe material 1 to obtain the ring-shaped member 10 (see FIG. 2) (flange portion separation step).

上記截頭円錐筒部成形工程（図１（ｂ））、フランジ部成形工程（図１（ｃ））、およびフランジ部切り離し工程（図１（ｄ））を順次繰り返すことにより、連続してリング状部材１０を製造することができる。   By successively repeating the above-mentioned frustoconical cylinder portion forming step (FIG. 1 (b)), flange portion forming step (FIG. 1 (c)), and flange portion separating step (FIG. 1 (d)), a ring is continuously formed. The shaped member 10 can be manufactured.

上記実施例による製造方法によれば、図３のようなスケルトンＳ１やスラッグＳ２を発生させることなく、素材ロス無く、１本のパイプ材１からプレス加工により多くのリング状部材１０を連続的に製造することができる。また、パイプ材１の端部にフランジ部１ｃを張り出し成形する工程と、該フランジ１ｃをパイプ材１から切り離す工程の数少ない工程でパイプ材１からリング状部材１０を簡単に得ることができる。したがって、リング状部材１０の加工コストを低減できる。   According to the manufacturing method according to the above-described embodiment, a large number of ring-shaped members 10 are continuously formed from one pipe member 1 by pressing without generating a skeleton S1 and a slug S2 as shown in FIG. Can be manufactured. In addition, the ring-shaped member 10 can be easily obtained from the pipe material 1 by a few steps including the step of projecting and forming the flange portion 1 c at the end of the pipe material 1 and the step of separating the flange 1 c from the pipe material 1. Therefore, the processing cost of the ring-shaped member 10 can be reduced.

Claims (1)

金属製のパイプ材からリング状部材を得るリング状部材の製造方法において、前記パイプ材の端部全周を内向きに曲げて先細状の截頭円錐筒部を成形する工程と、前記截頭円錐筒部を更に内向きに折り曲げ加工して内向きに張り出すフランジ部を成形する工程と、前記フランジ部をパイプ材から切り離してリング状部材を得る工程とを含んでおり、
前記截頭円錐筒部を成形する工程においては、外拡がり状の断面皿形のダイス穴を有する第１のダイスと、前記パイプ材の内径よりも小さい外径を有する第１のセンターピンとを用意し、前記ダイス穴内に前記第１のセンターピンの先端部を突出させ、前記パイプ材の端部を前記ダイス穴のテーパー内周と前記センターピンの突出先端部の外周との間に進入させることにより、前記パイプ材の端部全周を内向きに曲げて先細状の截頭円錐筒部を成形することを特徴とする、リング状部材の製造方法。In the method of manufacturing a ring-shaped member that obtains a ring-shaped member from a metal pipe material, a step of bending the entire periphery of the end of the pipe material inward to form a tapered truncated conical cylinder portion; and the wharf a step of forming a flange portion overhanging processed and inwardly folded further inwardly tapered tubular portion and Nde including the step of obtaining the ring-shaped member separately the flange portion from the pipe member,
In the step of forming the truncated conical cylinder portion, a first die having a die hole having an outwardly expanding cross-sectional dish shape and a first center pin having an outer diameter smaller than the inner diameter of the pipe material are prepared. The tip of the first center pin protrudes into the die hole, and the end of the pipe material enters between the taper inner periphery of the die hole and the outer periphery of the projecting tip of the center pin. The ring-shaped member manufacturing method is characterized by forming a tapered truncated conical cylinder portion by bending the entire circumference of the end portion of the pipe material inward .
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